The Data

• March 2021

• Disproportionality Index: a measure of fair representation

\[\frac{\%_{Group\: X; \:salary\: range \: i}}{\% _{All \:Employees; \:salary\: range \: i}} = DI _{Group\:X; \:salary\:range\:i}\] * For example, 23.3% of Black employees and 16.7% of all employees are are within the <60K salary range.

\[ DI_{Black \: employees; <60K } =\frac{23.3\%}{16.7\%} = 1.40\]

Plot 1: DI of all groups by salary range

The dotted line represents equitable representation. It can been seen that Black employees are overrepresented at the lower salary ranges and underrepresented at higher ranges compared to the other groups. As can be seen by the “All Non-Minority Employees” bars, an equal DI across all salary ranges should be expected.

Plot 1: Pros and Cons

Pros:

• This visualization allows for easy comparison between groups.
• The dotted line allows the reader to compare to a baseline (all non-minority employees).

Cons:

• This is a static figure.
• It is a little busier than others presented later.

Plot 2: DI Share by subgroups and salary range

Here, DI is subtracted from 1 to calculate a DI Share metric, meaning that 0 rather than 1 would represent equitable representation. Each column is coloured based on if the DI Share is negative or positive.

Plot 2: Pros and Cons

Pros:

• Under/overrepresentation is easiest to identify in this figure.
• This is an interactive visualization, allowing the user to hover on each bar and see the specific values associated with it.

Cons:

• Even values that would normally be considered “close enough” to 0, representing an about equitable DI share are designated a color, perhaps leading to some confusion.
• Comparison between groups within a salary level is not as intuitive here.

Plot 3: A direct comparison of DI in Black Employees vs. Non-Visible Minority Employees

This plot zooms in on our “baseline” group and compares it to the Black employee group, which appears to be the most affected by inequity. A steady decrease in representation with each increase in salary range is clearly visible for the Black employee group.

Plot 3: Pros and Cons

Pros:

• This plot tells the most focused story of the three.
• Transparency represents salary range, with lighter colors representing lower salary.

Cons:

• This is another static figure.
• Data from the other groups that would otherwise strengthen the core message is not included for brevity’s sake.